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A production process and system for high-precision lithium battery pole pieces

A production process and production system technology, applied in the production process and system field of high-precision lithium battery pole pieces, can solve the problems of inconsistent regional ductility, low edge quality of pole pieces, and inconsistent compaction density, etc. The effect of high processing quality and peel strength value

Active Publication Date: 2022-06-28
四川无量智慧道桥科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a high-precision lithium battery pole piece production process and system to solve the problems of pole piece rebound, inconsistent ductility in each area, and coating Influenced by the process, resulting in many problems such as uneven thickness of the pole piece, inconsistent compaction density, etc., as well as the problem of low edge quality of the pole piece and easy powder drop of the pole piece easily caused by the pole piece cutting process after the rolling process

Method used

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  • A production process and system for high-precision lithium battery pole pieces
  • A production process and system for high-precision lithium battery pole pieces
  • A production process and system for high-precision lithium battery pole pieces

Examples

Experimental program
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Effect test

Embodiment 1

[0053] like figure 1 The shown production process of a high-precision lithium battery pole piece includes the following steps:

[0054] (A) cutting to form current collectors having the required specifications;

[0055] (B) putting the current collector into the lower die of the die-casting device, and quantitatively extruding the slurry onto the current collector;

[0056] (C) the upper mold and the lower mold of the die-casting device are heated to the drying temperature;

[0057] (D) After maintaining the drying temperature for a certain period of time, the heating of the upper mold and the lower mold is stopped, and the current collector is die-cast during the cooling process to obtain a battery pole piece.

[0058] In one or more embodiments, ultrasonic vibration leveling is used to rapidly and uniformly spread the slurry over the current collector.

[0059] In some embodiments, the drying temperature is 140-160°C.

[0060] In some embodiments, the obtained battery po...

Embodiment 2

[0063] On the basis of Example 1, in the step (B), after the slurry is extruded onto the current collector, the lower die is heated to a first temperature, and the first temperature is 80-95°C; the slurry is After being extruded onto the current collector, the lower die is raised to the first temperature to preheat the slurry, so as to prevent the slurry from rapidly entering the constant-speed drying stage and causing defects due to excessive drying. In the step (D), the upper mold moves down from the initial position to the pre-pressing position, and when the temperature drops to the second temperature, the upper mold moves down from the pre-pressing position to the final die-casting position, and the first Two temperature is 90~125 ℃.

[0064] During the cooling process, in the early stage of cooling, the moisture diffusion rate inside the slurry is less than the vaporization rate of the surface moisture at the wet bulb temperature. At this time, the surface of the slurry c...

Embodiment 3

[0068] like Figure 2 to Figure 5 Shown is a production system for high-precision lithium battery pole pieces, the system includes a cutting device, a coating device and a die-casting device, wherein:

[0069] The cutting device is used for cutting copper foil or aluminum foil into a current collector 1 with required specifications by laser processing;

[0070] The coating device is used to quantitatively extrude the slurry into the lower die 3 of the die-casting device, and the slurry 2 is spread over the current collector 1;

[0071] The die-casting device further includes an upper die 6, and the upper die 6 squeezes the slurry and the current collector 1 in the lower die 3, and is die-casted to obtain a battery pole piece.

[0072] In this embodiment, the cutting device, the coating device and the die-casting device continuously complete the processes of cutting, coating and die-casting.

[0073] In one or more embodiments, ultrasonic vibration leveling is used to rapidly...

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Abstract

A production process and system for high-precision lithium battery pole pieces, wherein the production process includes the following steps: cutting to form a current collector with required specifications; placing the current collector into the lower mold of a die-casting device, and quantifying the slurry The upper mold and the lower mold of the die-casting device are heated to the drying temperature; after maintaining the drying temperature for a certain period of time, the upper mold and the lower mold stop heating, and the current collector is die-cast during the cooling process to obtain a battery electrode. piece. The present invention adopts the die-casting process instead of the rolling process in the traditional production process, and the current collector will not rebound after the external force is removed, and the pressure on the current collector is consistent everywhere, and there will be no inconsistent ductility in each area. Therefore, the thickness and compaction density of the battery pole piece produced by the die-casting process can be kept highly consistent, which significantly improves the processing quality, precision and yield of the battery pole piece.

Description

technical field [0001] The invention relates to the field of lithium battery pole piece processing, in particular to a production process and system for a high-precision lithium battery pole piece. Background technique [0002] With the development of lithium-ion battery technology, the application range of lithium-ion batteries is becoming more and more extensive. In addition to portable electronic products, it is also widely used in electric vehicles, large power sources and energy storage fields. Lithium-ion batteries are favored by consumers due to their high specific energy, high voltage, small self-discharge, environmental protection and good safety. [0003] The lithium battery pole piece is an important part of the lithium battery. The defects of the lithium battery pole piece will seriously affect the quality of the lithium battery, and even cause safety hazards. The manufacture of battery pole pieces belongs to the front-end process of the lithium battery process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/139
CPCH01M4/0404H01M4/0435H01M4/139Y02E60/10
Inventor 钱凤军吴波罗业富
Owner 四川无量智慧道桥科技有限公司
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